I wouldn't go that far to say ppl demanding concrete evidence about India's culpability in the Dasu terrorist attack are fools. It is not unreasonable to ask for evidence for charges as heavy as sponsoring terrorism to kill Chinese nationals.India was clearly behind the attack and anyone who has tracked the developments over the years in Pakistan knows about this. The nature of proxy attacks is such that you can never trace it to the shot callers in Delhi. So when ppl on this forum demand concrete evidence before blaming India then frankly they're fools.
Now ofcorse the messaging will differ. Pakistan and its public knows that India sponsors terrorism and they have no second thoughts in blaming them. China can't do the same because it will then cause a major diplomatic issue and even increase public pressure to respond. Hence China wont be in sync with Pakistan when to comes to pinpointing the culprit . Ambiguity in response suits China.
That being said. India is a prime suspect because it has a track record of sponsoring terrorism in Pakistan, Sri Lanka, and China. So I'm inclined to believe that India, with US support did it. I
mean what is the alternative? Pakistan did it? You can't be serious. Pakistan's counter terrorism is incompetent? Maybe, but violent terrorists don't emerge from a vaccuum. Especially terrorists that are targeting Chinese people in CPEC.